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-rw-r--r--include/drivers/rpi3/mailbox/rpi3_mbox.h39
1 files changed, 39 insertions, 0 deletions
diff --git a/include/drivers/rpi3/mailbox/rpi3_mbox.h b/include/drivers/rpi3/mailbox/rpi3_mbox.h
new file mode 100644
index 0000000..c107440
--- /dev/null
+++ b/include/drivers/rpi3/mailbox/rpi3_mbox.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2019, Arm Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef RPI3_MBOX_H
+#define RPI3_MBOX_H
+
+#include <stdint.h>
+
+/* This struct must be aligned to 16 bytes */
+typedef struct __packed __aligned(16) rpi3_mbox_request {
+ uint32_t size; /* Buffer size in bytes */
+ uint32_t code; /* Request/response code */
+ uint32_t tags[0];
+} rpi3_mbox_request_t;
+
+#define RPI3_MBOX_BUFFER_SIZE U(256)
+
+/* Constants to perform a request/check the status of a request. */
+#define RPI3_MBOX_PROCESS_REQUEST U(0x00000000)
+#define RPI3_MBOX_REQUEST_SUCCESSFUL U(0x80000000)
+#define RPI3_MBOX_REQUEST_ERROR U(0x80000001)
+
+/* Command constants */
+#define RPI3_TAG_HARDWARE_GET_BOARD_REVISION U(0x00010002)
+#define RPI3_TAG_END U(0x00000000)
+
+#define RPI3_TAG_REQUEST U(0x00000000)
+#define RPI3_TAG_IS_RESPONSE U(0x80000000) /* Set if response */
+#define RPI3_TAG_RESPONSE_LENGTH_MASK U(0x7FFFFFFF)
+
+#define RPI3_CHANNEL_ARM_TO_VC U(0x8)
+#define RPI3_CHANNEL_MASK U(0xF)
+
+void rpi3_vc_mailbox_request_send(rpi3_mbox_request_t *req, int req_size);
+
+#endif